Hamit SOLMAZ, Hasan YAMIK, Ahmet UYUMAZ, Emre YILMAZ, Seyfi POLAT

AN EXPERIMENTAL STUDY ON THE EFFECTS OF DIESEL AND JET-A1 FUEL BLENDS ON COMBUSTION, ENGINE PERFORMANCE AND EXHAUST EMISSIONS IN A DIRECT INJECTION DIESEL ENGINE

Bu çalışmada Jet-A1 (A100), dizel ve sırasıyla %25 Jet-A1/%75 dizel, %50 Jet-A1/%50 dizel ve %75 Jet-A1/%25 dizel hacimsel oranlarda karıştırılarak elde edilen yakıt karışımlarının (A25, A50, A75) tek silindirli, direkt enjeksiyonlu bir dizel motorunda yanma ve motor performansı üzerindeki etkilerini belirleyebilmek için deneysel çalışma gerçekleştirilmiştir. Bu amaçla, test motoru dört farklı motor torkunda (7.5, 11.25, 15 ve 18.75 Nm) ve maksimum motor tork devrinde (2200 d/d) çalıştırılmıştır. Silindir içi basınç, ısı dağılım oranı, tutuşma gecikmesi, yanma süresi ve egzoz emisyonlarının değişimi Jet- A1 ve dizel yakıt karışımları ile çalışan doğal emişli direkt enjeksiyonlu dizel motorunda incelenmiştir. Deney sonuçları motor yükü arttıkça tutuşma gecikmesi süresinin azaldığını göstermiştir. Motor yükü arttıkça maksimum silindir içi basıncın elde edildiği nokta krank açısın cinsinden rötara alınmıştır. Karışım yakıtlardaki Jet-A1 yakıt oranı arttıkça NOx emisyonları azalmış, CO ve duman emisyonları artmıştır. Bununla birlikte A25, A50 ve A75 yakıtları ile karşılaştırıldığında Jet-A1(A100) yakıtı ile yanma süresinin arttığı görülmüştür. Sonuçta, Jet A1 yakıtının dizel yakıtı ile karıştırılarak kullanılabileceği görülmüştür

DİREKT ENJEKSİYONLU BİR DİZEL MOTORUNDA DİZEL VE JET-A1 YAKIT KARIŞIMLARININ YANMA, MOTOR PERFORMANSI VE EGZOZ EMİSYONLARINA ETKİLERİ ÜZERİNE DENEYSEL BİR ÇALIŞMA

In this study, an experimental investigation was performed in order to determine the effects of Jet-A1(A100), diesel fuel and Jet-A1/diesel fuel blends (A25, A50, A75) including 25% Jet-A1/75% diesel, 50% Jet-A1/50% diesel and 75% JetA1/25% diesel by volume respectively on combustion and engine performance in a single cylinder, direct injection diesel engine. For this purpose, the test engine was run at four different brake torques (7.5, 11.25, 15 and 18.75 Nm) at maximum brake torque engine speed (2200 rpm). The variation of cylinder pressure, heat release rate, ignition delay, combustion duration and exhaust emission were investigated in a naturally aspirated direct injection diesel engine fueled with diesel-Jet-A1 fuel blends. The test results showed that ignition delay time decreased with the increase of brake torque. Maximum in-cylinder pressure was retarded versus crank angle with the increase of brake torque. NOx emissions decreased with the increase of amount of Jet-A1 in the test fuels, but CO and soot emissions increased. It was also found that combustion duration increased when Jet-A1 (A100) fuel was used compared to A25, A50, A75 test fuels. In conclusion, Jet-A1 aviation fuel can be utilized via mixing with diesel fuel in diesel engines

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